^Based on the data of the Dentsu Communication Institute and the data of Zuckerman. Largest values taken.
^Irreligion. Dictionary.com Unabridged (v 1.1). Random House, Inc. (accessed: December 14, 2008).
^The Religiosity Index is a measure of the importance of religion for respondents and their self-reported attendance of religious services. For religions in which attendance at services is limited, care must be used in interpreting the data. (Gallup WorldView)
^"Global Index Of Religion and Atheism"(PDF). Redcresearch.ie. Diarkibkan daripada yang asal(PDF) pada 2012-10-16. Dicapai pada 2011-11-01. line feed character in |title= at position 16 (bantuan) Publications are taken from Gallup
^"Adherents.com". Adherents.com. Dicapai pada 2011-02-04. Some publications